Method of producing a timber arch construction



June 29, 1965 S. L. OLSON METHOD OF PRODUCING A TIMBER ARCH CONSTRUCTION Original Filed Feb. 19, 1960 2 Shets-Sheet 1 mmvron. in WIN A. 04 50A! June 29, 1965 S. L- OLSON METHOD OF PRODUCING A TIMBER ARCH CONSTRUCTION Original Filed Feb. 19, 1960 2 Sheets-Sheet 2 m m w.

mm 1.. OLSON ATTOENEVJ United States Patent 3,191,238 METHOD OF PRODUCING A TIMBER ARCH CONSTRUCTION Sylvan L. (bison, Rte. 4, Richland Center, Wis. Continuation of application Ser. No. 9,892, Feb. 19, 1960. This application Nov. 3, 1961, Ser. No. 150,034 2 Claims. (Cl. 20-1) This application is a continuation of application Serial No. 9,892, filed February 19, 1960, FJOW abandoned, and relates to a method of producing a timber arch construction.

In the construction of buildings, particularly farm buildings, having timber arch construction, the haunch portion of such an arch is of importance. Presently in use are construction methods for building arch haunches. Generally, such construction includes base members, tie members, or the like. -Arch construction, particularly of the prefabrication type, generally does not lend itself to a construction in the field or in situ.

An object of the present invention is to provide a method of producing a timber arch construction which lends itself to field construction with ease and facility, and requiring no skilled labor in the construction thereof.

Another object of the present invention is to provide a method of producing a timber arch construction which lends itself to the fabrication of relatively large buildings without internal columns or posts.

A further object of the present invention is to provide a method of producing a timber arch construction which is sturdy, one which is simple in design and adaptable for fabrication in any size desired, and one which is economically feasible.

These and other objects and advantages of the present invention will be fully apparent from the following description when taken in conjunction with the annexed drawings, in which:

FIGURE 1 is an elevational view of an arch construction according to the present invention, the foundation members being shown in section partially embedded in a ground surface;

FIGURE 2 is an elevational view on an enlarged scale, of the haunch of the timber arch construction according to the present invention;

FIGURE 3 is an exploded isometric view showing the method of assembly of either the column or rafter piece of the arch construction;

FIGURE 4 is an isometric exploded view of the components of the arch;

FIGURE 5 is an exploded isometric view showing how the components are assembled; and

FIGURE 6 is an isometric view of the finished haunch.

Referring in greater detail to the drawings in which like numerals indicate like parts throughout the several views, in FIGURE 1 the reference numeral .10 designates, generally, foundation elements to which the construction of the present invention is attached, the construction being designated by the numeral 12.

The timber arch construction according to the present invention comprises a column piece 14 having a mitered end surface 16 pie-formed by cutting away a right-angled triangle fiat end piece 18. The construction 12 also includes a rafter piece 20 having a mitered end surface 22 ice pre-formed by cutting away a right-angled triangle flat end piece 24.

The column piece '14 and the rafter piece 20 are arranged so that the mitered end surfaces 16 and 22 abut each other and form a haunch. The one right-angled triangle flat end piece 18 is positioned so that the vertical leg abuts the corresponding vertical leg of the other rightangled triangle flat piece 24, as at FIGURE 5, in which the end piece 18 is shown in a position prior to insertion along the inner edge of the haunch formed by the abutting end portions of the column piece 14 or. rafter piece 20.

After the end pieces 18 and 24 have been positioned so that the hypotenuse legs abut and extend along the inner edge of the haunch, means is provided securing the haunch and the end pieces together. This means consists in a triangularly-shaped plate conformably shaped to the haunch and the end pieces and extending or bridging each of the opposite faces of the haunch and end pieces. Nut and bolt assemblies, as at 26, are employed to secure the plates 28 and 30 to the opposite faces of the haunch and the end pieces 18 and 24, as at FIGURE 6.

In FIGURE 3, three pieces of lumber are shown prior to cementing of the third piece on the other two. Adhesive, as at 32, is applied to both faces of the piece-s to be secured together and the pieces are clamped together until the adhesive dries. The pieces are designated by the nu merals v34, 35 and 3-8.

As many pieces of lumber may be employed to construct both the column piece 14 and the rafter piece 20, as desired, and the adhesive is also applied to the sides and ends of the end pieces '18 and 24 and to the confronting faces of the plates 28 and 30, prior to bolting of the assembly together.

In use, the arch construction of the present invention is readily and with facility constructed in the field by cutting the right-angled triangle fiat end pieces 18 and 24 from the column piece 14 and rafter piece 20, laying the mitered end surfaces of the column piece 14 and rafter piece 2% in abutting relation, cementing the same together with proper adhesive, placing the end pieces 1-8 and 24 on the inner edge of the haunch formed by the abutting end portions of the column and rafter pieces, cementing the end pieces to each other and to the adjacent parts of the column piece 14 and rafter piece 20 and then cementing the triangular plates 28 and 3% over the adjacent parts of the column and rafter pieces and the end pieces. Bolt and nut assemblies 26 are employed to secure the plates 28 and 39 to the haunch formed by the end portions of the column piece 14 and rafter piece 20.

What is claimed is:

1. The method for producing a timber arch construction comprising providing a timber column piece, cutting away a right-angled triangle flat end piece from one end of said timber piece to form a mitered end surface, providing a timber rafter piece, cutting away another rightangled triangle fi'at end piece from one end of said rafter piece to form another mite-red end surface, arranging said column and rafter pieces so that the mitered end surfaces abut each other, cementing abutting mitered end surfaces to form a haunch, positioning said end pieces so that the vertical legs abut each other and the hypotenuse legs abut and extend along the inner edge of said haunch, cementing the abutting vertical legs of said end pieces to each other and the abutting hypotenuse legs of said end pieces timber triangle plate, and cementing the triangle plates to the opposite faces of said haunch and said end pieces.

'2. The method according to claim 1, which includes in addition supplementing the adherence of said plates'to the opposite faces of said haunch and said end pieces by projection of bolt and nut assemblies through said plates and said haunch and said end pieces.

7' f 4 J 7 References Cited by the Examiner UNITED STATES PATENTS 209,024 10/78 Covert 20 -92 2,585,051 2/52 Simon 5055 2,713,924 7/55 'Tri-pp 50198 JACOB L. NACKENOEFIF, Primary Examiner.

WILLIAM I. MUSHAKE, Examiner. 

1. THE METHOD FOR PRODUCING A TIMBER ARCH CONSTRUCTION COMPRISING PROVIDING A TIMBER COLUMN PIECE, CUTTING AWAY A RIGHT-ANGLED TRIANGLE FLAT END PIECE FROM ONE END OF SAID TIMBER PIECE TO FORM A MITERED END SURFACE, PROVIDING A TIMBER RAFTER PIECE, CUTTING AWAY ANOTHER RIGHTANGLED TRIANGLE FLAT END PIECE FROM ONE END OF SAID RAFTER PIECE TO FORM ANOTHER MITERED END SURFACE, ARRANGING SAID COLUMN AND RAFTER PIECES SO THAT THE MITERED END SURFACES ABOUT EACH OTHER, CEMENTING ABUTTING MITERED END SURFACES TO FORM A HAUNCH, POSITIONING SAID END PIECES SO THAT THE VERTICAL LEGS ABUT EACH OTHER AND THE HYPOTENUSE LEGS ABUT AND EXTEND ALONG THE INNER EDGE OF SAID HAUNCH, CEMENTING THE ABUTTING VERTICAL LEGS OF SAID END PIECES OF EACH OTHER AND THE ABUTTING HYPOTENUSE LEGS OF SAID END PIECES TO THE INNER EDGE OF SAID HAUNCH, BRIDGING EACH OF THE OPPOSITE FACES OF SAID HAUNCH AND SAID END PIECES WITH A 